Datasheet

PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
General
V
CC Zener Voltage ICC < 1.5mA 8.6 9.0 9.3 V
Startup Current V
OUT = 0 150 250 µA
Operating Current I(V
OUT) VOUT = 11V, F = 150kHz 1.2 2.5 mA
Under-Voltage-Lockout
Start Threshold V
OUT = 0 8.0 8.4 8.8 V
Minimum Operating Voltage after Start V
OUT = 0 6.0 6.3 6.6 V
Hysteresis V
OUT = 0 1.8 V
Oscillator
Amplitude V
CC = 9V 3.5 3.7 3.9 V
C
T to DRIVE high Propagation Delay Overdrive = 0.2V 100 200 ns
C
T to DRIVE low Propagation Delay Overdrive = 0.2V 50 100 ns
Driver
VOL I = 20mA, V
CC = 9V 0.15 0.4 V
I = 100mA, V
CC = 9V 0.7 1.8 V
VOH I = −20mA, V
CC = 9V 8.5 8.8 V
I = −100mA, VCC = 9V 6.1 7.8 V
Rise Time C
LOAD = 1nF 35 70 ns
Fall Time C
LOAD = 1nF 30 60 ns
Line Voltage Detection
Charge Coefficient: I
CHG / I(TON) VCT = 3V, DRIVE = High, I(TON) = 1mA 0.73 0.79 0.85
Minimum Line Voltage for Fault R
ON = 330k 60 80 100 V
Minimum Current I(T
ON) for Fault RON = 330k 220 µA
On Time During Fault C
T = 150pF, VLINE = Min − 1V 2 µs
Oscillator Restart Delay after Fault 0.5 ms
V
OUT Error Amp
V
OUT Regulated 12V (ADJ Open) VCC = 9V, IDCHG = I(TOFF)/2 11.2 11.9 12.8 V
V
OUT Regulated 18V (ADJ = 0V) VCC = 9V, IDCHG = I(TOFF)/2 16.5 17.5 19.5 V
Discharge Ratio: IDCHG / I(TOFF)I(TOFF) = 50µA0.931.001.07
Voltage at T
OFF I(TOFF) = 50µA 0.6 0.95 1.3 V
Regulation gm (Note 1) Max I
DCHG = 50µA 1.0 mA/V
Max I
DCHG = 125µA 0.8 1.7 2.9 mA/V
Unless otherwise stated, these specifications hold for TA = 0°C to 70°C for the
UCC3889, -40°C to +85°C for the UCC2889, and -55°C to +125°C for the UCC1889.
No load at DRIVE pin (CLOAD=0).
ELECTRICAL CHARACTERISTICS
DIL-8, SOIC-8 (Top View)
N or J, D Package
CONNECTION DIAGRAM
ICC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Current into T
ON Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5mA
Voltage on V
OUT Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Current into T
OFF Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250µA
Storage Temperature . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Note: Unless otherwise indicated, voltages are referenced to
ground and currents are positive into, negative out of, the speci-
fied terminals.
ABSOLUTE MAXIMUM RATINGS
UCC1889
UCC2889
UCC3889
Note 1: gm is defined as
∆IDCHG
∆VOUT
for the values of V OUT when V OUT is in regulation. The two points used to calculate gm are for
I
DCHG at 65% and 35% of its maximum value.
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